On October 1,Allan Mailed an Offer to Bob to Sell

Multiple Choice

On October 1,Allan mailed an offer to Bob to sell to Bob 1000 boxes of tin plates at a fixed price.The offer was received by Bob on October 11,and Bob immediately accepted the offer by telegram on October 11 and confirmed by letter on October 15.On October 8,Allan mailed a revocation of his offer,which was received by Bob on October 20.In this situation

A) Allan's revocation is really a counter-offer.
B) Allan has no right to try to revoke his offer.
C) Allan's revocation comes too late and there is a contract between Allan and Bob.
D) Allan's revocation of his offer is proper and effective to prevent a contract between Allan and Bob.
E) none of the above